<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>05.form_fields | KnockOut</title>
  <script src="../assets/knockout-3.5.1.js"></script>
</head>
<body>

  <p>
    <input type="checkbox" data-bind="checked: hasCellphone" />
    我有手机
  </p>
  
  <p>
    手机号:
    <input type="text" data-bind="value: cellphoneNumber, enable: hasCellphone" />
  </p>
  
  <script type="text/javascript">
    function MyViewModel() {
      var self = this;

      self.cellphoneNumber = "";
      self.hasCellphone = ko.observable(false);
    }

    ko.applyBindings(new MyViewModel());
  </script>

</body>
</html>